/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
}

#app {
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.card {
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

p {
    margin-bottom: 15px;
}

.theme-btn {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    margin-right: 10px;
    margin-top: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.theme-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* 主题按钮样式 */
.light-btn {
    background-color: #f5f5f5;
    color: #333;
    border: 1px solid #ccc;
}

.dark-btn {
    background-color: #333;
    color: white;
}

.blue-btn {
    background-color: #0066cc;
    color: white;
}

.green-btn {
    background-color: #009933;
    color: white;
}

/* 主题样式 */
.light-theme {
    background-color: #f8f9fa;
    color: #333;
}

.light-theme .container {
    background-color: white;
    border: 1px solid #e0e0e0;
}

.light-theme header {
    border-color: #e0e0e0;
}

.light-theme .card {
    background-color: white;
    border: 1px solid #e0e0e0;
}

.dark-theme {
    background-color: #1a1a1a;
    color: #f0f0f0;
}

.dark-theme .container {
    background-color: #2d2d2d;
    border: 1px solid #444;
}

.dark-theme header {
    border-color: #444;
}

.dark-theme .card {
    background-color: #2d2d2d;
    border: 1px solid #444;
}

.blue-theme {
    background-color: #e8f4fd;
    color: #1a3c5a;
}

.blue-theme .container {
    background-color: #f0f8ff;
    border: 1px solid #b8d4f0;
}

.blue-theme header {
    border-color: #b8d4f0;
}

.blue-theme .card {
    background-color: #f0f8ff;
    border: 1px solid #b8d4f0;
}

.green-theme {
    background-color: #f0f9eb;
    color: #2d5016;
}

.green-theme .container {
    background-color: #f8fdf0;
    border: 1px solid #c8e6c9;
}

.green-theme header {
    border-color: #c8e6c9;
}

.green-theme .card {
    background-color: #f8fdf0;
    border: 1px solid #c8e6c9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content {
        grid-template-columns: 1fr;
    }
    
    .theme-btn {
        display: block;
        width: 100%;
        margin-bottom: 10px;
    }
}